52results about How to "Easy to observe and study" patented technology

The invention discloses a mobile display table for building design, and relates to the technical field of building design. The mobile display table comprises a supporting table, wherein walking wheelsare rotationally installed at the bottom of the supporting table; a sliding sleeve pipe driven by a height adjusting mechanism is vertically arranged on a stand column in a sliding mode; a containingbasket is fixed at the upper end of a steering shaft; and a bearing plate used for bearing a building model is in driving connection in the containing basket through a lifting mechanism. According tothe mobile display table, the building model designed by the building is stored through the containing basket; the lifting mechanism can drive the bearing plate to ascend and descend to achieve storage and extension of the building model out of the containing basket, so that the display operation of the building model is more flexible; an arranged steering mechanism can drive the containing basket to carry out automatic intermittent rotation through the steering shaft, so that the building model on the bearing plate can realize automatic rotary display; and meanwhile, the rotation intermittent period exists in the rotation process, so that a visitor can observe and study conveniently and carefully, and the display effect of the building design is greatly improved.

The invention discloses a resource display platform for design teaching in a digital media art environment. The resource display platform comprises a bottom box and a main computer machine cabinet located on one side of the bottom box, and two symmetrically arranged side frames are fixedly installed on the rear side of the upper surface of the bottom box. According to the resource display platformfor design teaching in the digital media art environment, a work display platform is arranged, art design works of students can be placed on the work display platform for display, so that the art design works can be displayed visually, the students can conveniently learn from one other, and the improvement of the interest of learning and communication between the students is facilitated; and courseware works of teachers can further be displayed through a panel display or projection cloth, so that the teachers can display digital media art more dynamic and vividly, better teaching effect can be conveniently achieved, and a display method is versatile to facilitating choosing and using of the teachers for teaching according to actual needs.

The invention relates to a method for determining the pollen viability of watermelon, belonging to the technical field of plant. The invention discloses a method for determining the pollen viability of watermelon by using an in-vitro germination method, and the pollen viability of the watermelon can be effectively determined. An in-vitro pollen germination culture medium used comprises the following components of 200g / L sucrose, 10mg / L H3BO3, 800mg / L Ca(NO3)2.4H2O, and 6.5g / L agar. The method comprises the following steps: evenly sowing pollen into the solid culture medium, and culturing at dark conditions 85% relative humidity at 25DEG C; and after four hours, observing the pollen germination and pollen tube growth situations through an optical microscope. The method is simple, completely quantitative, reliable in data, and strong in operability, has higher practical application values, and achieves important significance on the breeding efficiency of watermelons.

The invention relates to the cytobiology field, and discloses a neuronal cell and neuroglial cell ordered co-culture device and a preparation method and an application thereof. The device includes a substrate and a polydimethylsiloxane stamper, wherein the polydimethylsiloxane stamper can be removably compounded on the substrate; the polydimethylsiloxane stamper includes at least one micropore unit, the micropore unit includes at least one first through hole perpendicular to the substrate and at least one second through hole perpendicular to the substrate, the first through hole and the second through hole are arranged successively, and the first through hole and the second through hole respectively with the surface of the substrate form grooves having one end with an opening; the distance between the first through hole and the second through hole is 500 [mu]m-2000 [mu]m. Neuronal cells and neuroglial cells are inoculated through the first through hole and the second through hole which are perpendicular to the substrate, uniformity of the two kinds of cells is easy to control during inoculation in regions, cell quantity which can be used is increased, a population effect is obvious, and observation and study are facilitated.

The invention relates to a polycaprolactone (PCL) and polylactic acid (PLA) human body absorbable vascular stent and a preparation method thereof. The two ends of a degradable vascular stent prepared from PCL and PLA fibers are provided with tracing joints with X-ray dominance. The preparation method comprises the following steps of: preparing PCL and PLA as-spun fibers by a melt blended spinning method and stretching the PCL and PLA as-spun fibers; and weaving the stretched fibers on a self-made vascular stent die, connecting the heads of the fibers by using barium sulfate and PCL hollow tubular joints, and performing heat setting on the stent to obtain the vascular stent of which the two ends have the X-ray dominance. The material of the stent has high compatibility with a human body, the prepared stent has stable performance, and the barium sulfate tubular joints at the two ends of the stent have the function of in-vivo X-ray tracing targets, so the stent is convenient to observe and research after being implanted into the human body; and the preparation method is simple and has low cost and good application prospect.

The invention discloses medical operation teaching equipment. The medical operation teaching equipment includes an operation device and an auxiliary device. Supporting columns are arranged on the top surface of an operating table pedestal. An operation operating bench is arranged above the supporting columns. A guide rail is horizontally arranged on the top of the wall of an operating room. A wireless information transmission module is connected to a microprocessor through a data transmission wire. The microprocessor is connected to the implementation element through a data transmission wire. The implementation element is connected to a servo motor through a lead. A high definition camera is connected to an externally-connected display through a data transmission wire, and also connected to a memory through a data transmission wire. Students outside the operating room transmits an instruction to the wireless information transmission module, the instruction is processed by the microprocessor and then drives the servo motor to the high definition camera to move, and thus the students can timely observe the process of an operation from many angles. Moreover, the memory is additionally adopted to enable the process of an operation to be videoed so that teaching videos can be provided for future operation experiences. Compared with prior art, the equipment has the above advantages.

The invention discloses a boring insect larva host transfer experimental method. The boring insect larva host transfer experimental method involves with a dissecting tool, a plastic test tube with a cover, an awl and a tying belt; the experimental method is characterized by comprising the steps of (1) collecting larvae, (2) selecting a host plant for transfer and a transfer part, (3) treating the transfer part, and (4) transferring into the host. According to the method, the boring insect larvae found in a wild mountain by investigation, having a study value and needing t be further studied can be transferred to an experiment site convenient in traffic and convenient for observation and study by use of the test tube with the cover, and therefore, the method has very important significance for studying and grasping the biological and ecological properties, the development law and the pest harm characteristics of the boring insects, as well as the prevention and control technique on the boring insects.

The invention discloses a vein puncture training tool and relates to the field of medical teaching. The tool includes a hand model and a simulation vein vessel. The hand model is composed of a plurality of cotton clothes which are twined together and are put on a latex glove. The simulation vein vessel is adhered to the back of the hand model at interval by an adhesive. The simulation vein vessel is a natural latex tube. According to the invention, the tool can address the problems of complex structure, high exchanging rate caused by susceptibility to damage in training and failure of wide application in medical schools and all levels of medical agencies due to high prices that are common of current vein puncture training tools.

The invention belongs to the technical field of teaching tools and discloses a teaching demonstrating device for the environment art design major. The teaching demonstrating device comprises a demonstrating device body. The demonstrating device body comprises a flat plate, a drawer, a cabinet and support plates. A support rod is mounted at the upper end of the demonstrating device body. A control switch is mounted on the support rod. A lamp base is mounted at the upper end of the support rod. A lamp is mounted at the lower end of the lamp base. The flat plate and the support plates are provided with rough face plates. Rotary shafts are mounted on two sides of the flat plate. The flat plate is fixedly connected with the support plates through the rotary shafts. A fixing device is mounted on each support plate. The teaching demonstrating device has the advantages that by the rough face plates of the flat plate and the support plates, to-be-demonstrated objects placed on the flat plate and the support plates cannot easily slide down from the flat plate and the support plates; by the fixing devices on the support plates, the support plates can be fixed to the corresponding sides of the demonstrating device body when not used, and the supporting plates are prevented from colliding with the demonstrating device body to damage the same during the moving process of the demonstrating device body.

The invention discloses a broken cultural relic supporting system. The broken cultural relic supporting system comprises an inner supporting module, an outer supporting buckle and a connecting fastener, wherein the inner supporting module is arranged in a broken cultural relic to support the broken cultural relic from the interior, the outer supporting buckle is detachably connected with the innersupporting module, and the connecting fastener is used for fixing fragments of the broken cultural relic. The inner supporting module is mainly formed by splicing a main body module and a plurality of split modules, each split module is detachably connected with the main body module, one end of the outer supporting buckle is connected with the inner supporting module, the other end of the outer supporting buckle is arranged below the inner supporting module so as to support the inner supporting module, and the connecting buckle is connected with the inner supporting module so as to fix the fragments to the inner supporting module. By means of the arrangement, all the parts of the broken cultural relic are connected and assembled with the inner supporting module in a mechanical detachablemode, bonding or welding is not needed, repeated disassembly and assembly can be easily and conveniently achieved, and experts and scholars can conveniently conduct subsequent research or further maintenance treatment on the cultural relic.

The invention relates to a decelerator assembly and disassembly teaching workbench, and the workbench comprises an operating platform. The center of the lower surface of the operating platform is provided with a rotating shaft A, and the rotating shaft A is provided with a gear A. The gear A is in engaged connection with a gear B, and the gear B is fixed on a rotating shaft B. The rotating shaft Bis disposed on the lower surface of the operating platform, and the lower end of the rotating shaft B is connected with a support leg through a thread. The rotating shaft A is provided with a bevel gear A, and the bevel gear A is in engaged connection with a bevel gear B. The bevel gear B is fixed on a rotating shaft C, and the rotating shaft C is rotatingly disposed on the lower surface of the operating platform. The outer end of the rotating shaft C is connected with a rolling wheel A, and the upper surface of the operating platform is connected with a rotating platform through a rotating shaft D. The upper surface of the rotating platform is provided with a support, and the support is connected with a decelerator fixing frame through a rotating shaft E. The left end of the rotating shaft E is fixedly provided with a braking disc. The outer side of the braking disc is sleeved by a braking frame, and the braking frame is hinged to the support. Generally speaking, the workbench is novel in structure design, is convenient to install and disassemble, and is good in simulation and teaching demonstration effect.

The invention belongs to the technical field of teaching appliance, and especially discloses a student chemical experiment table. The student chemical experiment table is used for solving a problem inthe prior art that experiment tables may be damages by accumulated water in storage process of washed vessels and tools. The student chemical experiment table comprises an experiment table with a cylindrical structure; the periphery wall of the experiment table is provided with fixing grooves in annular arrays; placing plates are arranged between the two side internal walls of each fixing grooveusing bolts at equal intervals in the vertical direction so as to form placing cavities in the fixing grooves at equal vertical intervals; one side internal wall of each fixing groove is connected with a cabinet door through hinge joint. In applications, washed vessels and tools are stored on the placing plates in the placing cavities, residual water falls onto the placing plates from the vesselsand the tools, and falls into a connecting groove through water guide holes; water in the connecting groove falls into a drain hole, falls into a water outlet at the bottom of a washing groove throughthrough holes, and is discharged.

The invention relates to a high sensitive voltmeter. The high sensitive voltmeter comprises a shell, a pointer, a dial, a moving coil and a plurality of binding posts, wherein the moving coil is arranged inside the shell and connected with the pointer, the plurality of binding posts are arranged below the shell, the moving coil comprises an aluminium sash and a coil wound on the aluminium sash, and the three binding posts comprise two binding posts with different measuring ranges and one negative binding post. The moving coil in an ordinary voltmeter is completely altered and rewound by using very thick wires, the small electromotive force can be amplified for scores of times and displayed, and the measuring range of 3 DEG C or 30 DEG C can be selected and used for displaying temperature differences. In the invention, compared with the ordinary voltmeter, the sensitivity of a micro voltage is improved by scores of times, and experimental effects are intuitive and visible; the high sensitive voltmeter is convenient for students to learn by observation and particularly suitable for classroom teaching and experiments, can be used for measuring the temperature difference and has wider application range, low cost, easy operation, simple structure, accurate and reliable measuring data, small volume, convenient carrying and convenience for generalizing and applying in a wide range of areas.

The invention discloses an audio video record playback experimental animal cage. The audio video record playback experimental animal cage comprises a cage body, a handle and a multi-media device. The multi-media device comprises a support, a camera, a microphone, a storage and a network device. An infrared high-speed camera is adopted in the camera. The handle and the support are arranged on the top portion of the cage body, the storage is arranged on the cage body, the camera and the microphone are arranged on the support, and the camera and the network device are connected. Through the method, the audio video record playback experimental animal cage can record behavior and voice of an animal at any time anywhere, brings convenience to observing and studying of people, and is convenient to use.

The invention discloses a rock core holder for CT scanning. The holder comprises a main body. A rock core placing cylinder is arranged in the middle of the main body. The external surface of the mainbody is provided with a PLC controller. The input terminal of the PLC controller is electrically connected to the output terminal of an external power supply. The lateral surface of the main body is provided with a groove. The interior of the main body is provided with an installation groove. The lower surface of the interior of the installation groove is provided with a first electric telescopingrod. The telescoping end of the first electric telescoping rod is provided with a second electric telescoping rod. A motor is arranged in the telescoping end of the second electric telescoping rod. The rock core holder for CT scanning improves the automation degree, can automatically fix a rock core in the rock core placing cylinder, and will not destroy the rock core. Through the groove, the rock core is placed in the rock core placing cylinder, the first electric telescoping rod can drive the elevating of the second electric telescoping rod, the rock core can be conveniently placed into therock core placing cylinder, the second electric telescoping rod drives a non-slip block through a push block so as to clamp the rock core, and the clamping stability is improved.

The invention discloses a making device and method for a millet or wheat root system specimen. The making device mainly comprises three parts of an underground root system planting chamber, a plantingtube and a root system flushing water tank; the underground root system planting chamber is formed under the ground, so that the underground root system planting chamber is similar to a natural growth environment of the millet or wheat root system and is convenient to take out; the planting tube has a tubular body, the two ends of the tubular body are open, one end of the tubular body is exposedto the outside of the ground, and the other end of the tubular body is provided with a permeable soil blockage device; the root system flushing water tank has a space capable of containing the planting tube and is provided with a water inflow and outflow port. The making device is convenient and simple to use, the labor intensity can be greatly reduced, and the root system specimen is completely made, and is convenient to store for a long time, observe and research, and the making device and method are suitable for making for specimens of underground root systems of low crops such as millet and wheat.

The invention discloses a high-precision table type rotating ultrasonic rock coring device, and belongs to the technical field of rock coring. The device comprises a supporting assembly, a transmission assembly and an ultrasonic rock breaking assembly. The supporting assembly is located on the outmost side of the whole device, the transmission assembly is located on the upper end in the supportingassembly, the ultrasonic rock breaking assembly is mounted on the lower end in the supporting assembly, the device is scientific and reasonable, use is safe and convenient, ultrasonic vibration is used for carrying out resonance breaking on the rock, compared with a traditional manner that a drill bit drills for coring, the coring efficiency is greatly improved, a rock sample can be subjected tosurface grinding through the device, the surface of a coring sample is flat, the rock sample can enter a coring groove favorably, a related worker can carry out observing and research, when the top end of the coring rock sample reaches the height of a distance sensor, the device can cut off the rock sample, the cut-off rock coring sample can be conveniently taken out by an operator from the top ofa coring groove, and convenience and rapidness are achieved.

The invention discloses a mobile display table for building design, and relates to the technical field of building design. The mobile display table comprises a supporting table, wherein walking wheelsare rotationally installed at the bottom of the supporting table; a sliding sleeve pipe driven by a height adjusting mechanism is vertically arranged on a stand column in a sliding mode; a containingbasket is fixed at the upper end of a steering shaft; and a bearing plate used for bearing a building model is in driving connection in the containing basket through a lifting mechanism. According tothe mobile display table, the building model designed by the building is stored through the containing basket; the lifting mechanism can drive the bearing plate to ascend and descend to achieve storage and extension of the building model out of the containing basket, so that the display operation of the building model is more flexible; an arranged steering mechanism can drive the containing basket to carry out automatic intermittent rotation through the steering shaft, so that the building model on the bearing plate can realize automatic rotary display; and meanwhile, the rotation intermittent period exists in the rotation process, so that a visitor can observe and study conveniently and carefully, and the display effect of the building design is greatly improved.

The invention belongs to the technical field of toolboxes for teaching aids, in particular to a toolbox for teaching aids for applied mathematics; it includes a box body; a storage cavity is opened inside the box body, and the height of the box body is greater than the length of the box body; The side wall is provided with a sliding slot, and a drawer box is slidably inserted into the sliding slot; the upper end of the box body is connected to the box cover through hinge rotation, and the side wall of the box body is hinged with an L-shaped engaging block through a hinge seat; The horizontal engaging end of the L-shaped engaging block is engaged on the box cover; the drawer box includes a horizontal slide plate, two side baffles and an end engaging plate; both sides of the horizontal slide plate are connected with two side baffles through hinge rotation, and There are T-shaped slots on the front and rear ends of the baffles on both sides; T-shaped engaging strips are provided on the inner wall of the end engaging plate, and the T-shaped engaging strips slide and engage in the T-shaped slots; it is convenient for large and long Long teaching aids are stored, and the folded drawer box can be disassembled and put into the box, while reducing the occupied space of the box.

The invention relates to a display device for environmental art design teaching. The display device for environmental art design teaching comprises a base, a lifting device, a first display area, a second display area and a storage box; grooves are respectively formed in the two sides in the lower part of the base; a moving device is arranged in each groove; the lifting device comprises an electric hydraulic rod; the storage box is fixed to the shaft end of the electric hydraulic rod; the side wall of the storage box is hinged to doors; the first display area comprises at least three hanging hooks; the hanging hooks are uniformly distributed at the bottom of the storage box; the second display area comprises a rotating seat which is fixed to the upper part of the storage box; a rotating post is rotatably arranged on the rotating seat; the lower part of the rotating post is fixedly connected with a gear in a sleeving manner; an electric pushing rod I is fixedly arranged above the storage tank; the shaft end of the electric pushing rod I is connected with a gear rack matched with the gear; the outside wall in the circumferential direction above the rotating post is uniformly hinged to three display plates; an electric pushing rod II is hinged between each display plate and the rotating post. The display device for environmental art design teaching has the following advantages that the display device is more convenient to use, can rotate back and forth and facilitates observation.

The invention discloses a high-precision table type rotating ultrasonic rock coring device, and belongs to the technical field of rock coring. The device comprises a supporting assembly, a transmission assembly and an ultrasonic rock breaking assembly. The supporting assembly is located on the outmost side of the whole device, the transmission assembly is located on the upper end in the supportingassembly, the ultrasonic rock breaking assembly is mounted on the lower end in the supporting assembly, the device is scientific and reasonable, use is safe and convenient, ultrasonic vibration is used for carrying out resonance breaking on the rock, compared with a traditional manner that a drill bit drills for coring, the coring efficiency is greatly improved, a rock sample can be subjected tosurface grinding through the device, the surface of a coring sample is flat, the rock sample can enter a coring groove favorably, a related worker can carry out observing and research, when the top end of the coring rock sample reaches the height of a distance sensor, the device can cut off the rock sample, the cut-off rock coring sample can be conveniently taken out by an operator from the top ofa coring groove, and convenience and rapidness are achieved.

The invention relates to a titanium alloy surfacing gas protective cover fixed to a welding gun. The titanium alloy surfacing gas protective cover fixed to the welding gun comprises a base, a fixing cross beam and front covers. The fixing cross beam is arranged in the middle of the base and provided with two side walls used for clamping the welding gun. The front covers are symmetrically arranged on the two sides of the side wall of the fixing cross beam. First gas circuit loops are arranged inside the front covers, and second gas circuit loops nested with the first gas circuit loops are arranged on the base. A threaded hole connected with an external air pipe is formed in the upper portion of each front cover. Gas jet holes are formed in the lower portions of the front covers. According to the titanium alloy surfacing gas protective cover, through symmetrical cavities which are provided with the gas circuit loops and located on the two sides, protective gas is blown out from the gas jet holes in a symmetrical fan shape and located on the same line with a nozzle of the welding gun; the protective cover is erected above a welding bead and covers the whole welding bead from top to bottom, a gas protective film is formed around a whole surfacing layer, the whole surfacing layer is better protected, and the defect that in the prior art, protection of a gas circuit passing through the welding gun is insufficient is overcome; and the structure is simple, the gas protection effect is obvious, and the protection effect in the electric arc surfacing process of titanium alloy is good.

The invention discloses a support system for broken cultural relics, which includes: an inner support module arranged inside the broken cultural relics to support the broken cultural relics from the inside, an outer support buckle detachably connected with the inner support module, and used for fixing the broken cultural relics pieces of connecting fasteners. The inner support module is mainly composed of the main module and several split modules. Each split module is detachably connected with the main module. One end of the outer support buckle is connected with the inner support module, and the other end is set on the inner support module. Below, to support the inner support module, the connecting fastener is connected with the inner support module for fixing the fragments on the inner support module. In this way, each part of the broken cultural relics is connected and assembled with the inner support module in a mechanically detachable manner, without bonding or welding, and can be easily and repeatedly disassembled and assembled, which is convenient for experts and scholars to carry out subsequent research on cultural relics or further maintenance and treatment .

The invention relates to the technical field of building design, in particular to a building design movable display stand which comprises two bottom plates, the two bottom plates are symmetrically arranged, supporting columns are symmetrically and fixedly connected to the left and right ends of the top ends of the bottom plates, a threaded sleeve is installed between the two supporting columns, and supporting rods are slidably connected into the supporting columns. A display panel is fixedly connected to the top ends of the two supporting rods, a mounting frame is fixedly connected to one side of the top end of the threaded sleeve, a lifting device is fixedly arranged at the top end of the mounting frame and comprises a threaded rod, the threaded rod is in threaded connection with the interior of the threaded sleeve, and a fixing block is fixedly connected to the top end of the threaded rod; the left end and the right end of the fixing block are transversely connected with connecting rods, and the ends, away from the fixing block, of the connecting rods are fixedly connected with the supporting rod. By arranging the lifting device and the rotating device, the display height and the display angle of the bearing plate can be effectively adjusted, so that the display effect of the bearing plate is improved, and people can use the bearing plate conveniently.

The invention particularly relates to a natural-state pig face image acquisition method and system. The method comprises the steps that pigs are driven into a device, limiting adjustment is conductedon the pigs through a limiting fence, the height of a feeding trough is adjusted, the heads of the pigs in the feeding process are lifted, and the faces of the pigs are shot through a camera; the images are stored, so that subsequent comparative analysis on the health state of the pig is facilitated; according to the invention, manual work can be replaced, and image acquisition is carried out on atarget object face through the camera device; according to the system, manual observation on the face of the pig is reduced, and the image is stored, so that subsequent pig health forms can be compared conveniently, and the state of the pig can be known immediately; and corresponding countermeasures are taken, so that the defects and technical limitations of manual observation can be well overcome and solved technically.

The invention relates to the technical field of teaching systems, in particular to a four-in-one teaching system with animation symbols as a teaching core, which comprises a teaching system, the teaching system comprises an information acquisition module, a communication module, a cloud database, an external device and an interaction module, and the cloud database comprises a storage module, a classification module, an identification module and a retrieval module, the storage module is used for storing teaching resources in a database form or a file form, the classification module is used for classifying the teaching resources according to a knowledge system of a subject where the teaching resources are located, and the identification module is used for identifying the teaching resources; the communication device and the interaction module facilitate communication and discussion between teachers and students outside and inside classes, and the teaching quality is improved; when the teaching system is used, a student can retrieve the information of the storage module through the external device so that the student can observe and learn conveniently, and meanwhile, a teacher can check the learning condition of the student through the camera device of the external device so that the student can be guided to learn conveniently.

The invention relates to the field of plant rhizosphere soil research equipment, and particularly relates to a rhizosphere soil culture device and method. The rhizosphere soil culture device comprisesa shell for containing soil and a plant root system; the top surface of the shell is open; a position, close to a side surface A, of the bottom surface of the shell is provided with a gap for enabling the plant root system to grow downwards into a culture solution tank; the rhizosphere soil culture device further comprises a water-permeable thin film which cannot be penetrated by the plant root system; and the water permeable thin film is arranged in the shell and divides the inner space of the shell into a soil containing part and a plant root system containing part; The invention further discloses a rhizosphere soil culture method suitable for the device. Through the use of the device and the method, a large amount of complete rhizosphere soil can be obtained, and meanwhile, the obtained rhizosphere soil can show a gradient effect of the plant root system on the soil.

The invention discloses a gravity dehydration experiment teaching device and method. The gravity dehydration experiment teaching device comprises a tank body, an oil tank, a water tank, a mixer, an oil collecting tank and an adjusting water tank. The oil tank and the water tank are respectively communicated with one end of the mixer, and the other end of the mixer is communicated with the tank body; the tank body is made of transparent organic glass; a central manifold is arranged on the inner side of the bottom of the tank body, one end of the central manifold is communicated with the mixer through a liquid inlet pipe, and a liquid preparation pipe is arranged at the other end of the central manifold; an oil collecting groove is formed in the inner wall of the upper end of the tank body; the bottom of the oil collecting groove communicates with the oil tank through an oil outlet pipe; and an adjusting water tank is arranged on the outer wall of the upper end of the tank body, a water collecting pipe is further arranged at the bottom of the tank body, the water collecting pipe is communicated with the adjusting water tank, and the adjusting water tank is further communicated with the water tank and the tank body through a water outlet pipe and a balance pipe. The internal structure and the working process can be directly observed conveniently, and a teacher can carry out experiment teaching conveniently.